Pinpoint Test AG - DTC: U3003:16 and U3003:17

WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Supplemental Restrain System for schematic and connector information.

NOTE: Diagnostic Trouble Codes (DTCs) U3003:16 and U3003:17 can be set if the vehicle has been recently jump started, the battery has been recently charged or the battery has been discharged. The battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if the battery has been left unattended with the accessories on.

Normal Operation - RCM

The RCM continuously monitors the input voltage for correct operation. If the RCM detects input voltage below 9.0 volts while a fault is present, or below 6.0 volts, whether or not a fault is present, it stores DTC U3003:16 in memory. If the RCM detects input voltage above 16 volts while a fault is present, or above 18 volts, regardless of fault status, it stores DTC U3003:17 in memory. If the RCM sets DTC U3003:16 or U3003:17, it sends a message to the IPC to illuminate the airbag warning indicator.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U3003:16	Battery Voltage: Circuit Voltage Below Threshold	This DTC sets if the RCM detects voltage below 9 volts with a SRS fault or below 6 volts, whether or not a SRS fault exists.
U3003:17	Battery Voltage: Circuit Voltage Above Threshold	This DTC sets if the RCM detects voltage above 16 volts with a SRS fault or above 18 volts without a SRS fault.

Possible Sources

Wiring, terminals or connectors
RCM

Visual Inspection and Diagnostic Pre-checks

Inspect for damaged wiring harness(es).
Inspect for loose or damaged connectors.

PINPOINT TEST A : U3003:16 AND U3003:17

WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE: Only disconnect or reconnect SRS components when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.
NOTE: Install new components only when directed to do so in the pinpoint test.
NOTE: Always make sure the correct SRS component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford parts catalog to make sure the correct component is being installed. If an incorrect SRS component is installed, Diagnostic Trouble Codes (DTCs) may set.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

A1 RETRIEVE ALL CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS) IN ALL MODULES

WARNING: Before beginning any service procedure, refer to Safety Warnings in General Information. Failure to follow this instruction may result in serious personal injury.
- REFER to: Pyrotechnic Device Health and Safety Precautions .
- Ignition ON.
- Using a diagnostic scan tool, retrieve ALL Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Is DTC B1317, B1318, B1676, U3003:16 or U3003:17 present in one or more modules AND are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM?

Yes DIAGNOSE the charging system. Refer to the appropriate Battery and Charging System article for the procedure.

No GO to A2

A2 CHECK FOR BECMB (EXTENDED POWER MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
- Review the Diagnostic Trouble Codes (DTCs) recorded in the previous step.
Were any BECMB Diagnostic Trouble Codes (DTCs) retrieved and recorded?

Yes DIAGNOSE the BECMB Diagnostic Trouble Codes (DTCs). REFER to the DTC Chart: Extended Power Module [BECM-B] .

No GO to A3

A3 TEST BATTERY CONDITION

Ignition OFF.

Carry out the Battery Condition Test. Refer to: Battery .

Did the battery pass the condition test?

Yes

If the battery passed the condition test but required a recharge, DIAGNOSE the charging system. Refer to the appropriate Battery and Charging System article for the procedure. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs). If the battery passed the condition test and did not require a recharge, GO to A4

No	INSTALL a new battery. Refer to: Battery . CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

A4 CHECK THE CHARGING SYSTEM VOLTAGE

Start the engine.

Measure the voltage of the battery.

For DTC U3003:17, turn off all accessories while measuring the battery voltage.

For DTC U3003:16, turn on headlights and HVAC fan on high while measuring the battery voltage.

Is the voltage between 13 and 15.2 volts?

Yes	For DTC U3003:16, GO to A5. For DTC U3003:17, GO to A7

No	DIAGNOSE the charging system. Refer to the appropriate Battery and Charging System article for the procedure. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

A5 CHECK FOR HIGH RESISTANCE IN THE IGNITION CIRCUIT TO THE MODULE

Ignition OFF.

Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering .

Disconnect BECMB C2518 .

Disconnect RCM C310A and C310B .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C310A-19	Courtesy of FORD MOTOR COMPANY	C2518-3

Is the resistance less than 1 ohm?

Yes

GO to A6

No	REPAIR the circuit as necessary. Refer to Connector Repair Procedures for schematic and connector information. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

A6 CHECK FOR HIGH RESISTANCE IN THE MODULE GROUND CIRCUIT

Measure:

Positive Lead	Measurement / Action	Negative Lead
RCM mounting bracket	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 1 ohm?

Yes

GO to A7

No	VERIFY there is no corrosion between the RCM and the mounting surface. VERIFY the fasteners are clean and tightened to specification with no corrosion. REPAIR as necessary. Refer to Connector Repair Procedures for schematic and connector information.

A7 CHECK FOR MODULE OPERATION

Ignition OFF.

Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering .

Disconnect RCM C310A and C310B (if not previously disconnected).

Check for the following:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Connect RCM C310A and C310B . Make sure the connector seats correctly and engages the Connector Position Assurance (CPA) lever/lock.

Repower the SRS. Do not prove out the SRS at this time. Refer to: Supplemental Restraint System (SRS) Repowering .

Is the concern still present?

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RCM. REFER to: Restraints Control Module (RCM) .

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.